package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.dto.SetmealDto;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.entity.SetmealDish;
import com.itheima.reggie.mapper.SetmealMapper;
import com.itheima.reggie.service.SetmealDishService;
import com.itheima.reggie.service.SetmealService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;
import java.util.stream.Collectors;

@Service
public class SetmealServiceImpl extends ServiceImpl<SetmealMapper, Setmeal> implements SetmealService {

    @Autowired
    private SetmealDishService setmealDishService;


    /**
     * 新增套餐,同时需要保存套餐和菜品的关联关系
     *
     * @param setmealDto
     */
    @Override
    @Transactional
    public void saveWithDish(SetmealDto setmealDto) {
        //保存套餐的基本信息,操作setmeal,执行insert操作
        this.save(setmealDto);
        List<SetmealDish> setmealDishes = setmealDto.getSetmealDishes();
        setmealDishes = setmealDishes.stream().map((item) -> {
            item.setSetmealId(setmealDto.getId());
            return item;
        }).collect(Collectors.toList());
        //保存套餐和菜品的关联信息,操作setmeal_dish,执行insert操作
        setmealDishService.saveBatch(setmealDishes);
    }

    /**
     * 删除套餐,同时删除SetMealDish表中的对应的菜品信息
     * @param ids
     * @return
     */
    @Override
    @Transactional
    public boolean deleteWithSetmealDish(List<Long> ids) {
        LambdaQueryWrapper<Setmeal> setmeallqw = new LambdaQueryWrapper<>();
        setmeallqw.in(Setmeal::getId,ids);
        setmeallqw.eq(Setmeal::getStatus,1);
        int count = this.count(setmeallqw);
        if (count > 0){
            return false;
        }
        this.removeByIds(ids);
        LambdaQueryWrapper<SetmealDish> setmealDishlqw = new LambdaQueryWrapper<>();
        setmealDishlqw.in(SetmealDish::getSetmealId,ids);
        setmealDishService.remove(setmealDishlqw);
        return true;
    }

    /**
     * 根据id查询套餐和对应的菜品信息
     * @param id
     * @return
     */
    @Override
    public SetmealDto getByIdWithDish(Long id) {
        Setmeal setmeal = this.getById(id);
        SetmealDto setmealDto = new SetmealDto();
        BeanUtils.copyProperties(setmeal,setmealDto);

        LambdaQueryWrapper<SetmealDish> lqw = new LambdaQueryWrapper<>();
        lqw.eq(SetmealDish::getSetmealId,setmeal.getId());
        List<SetmealDish> dishList = setmealDishService.list(lqw);
        setmealDto.setSetmealDishes(dishList);
        return setmealDto;
    }

    /**
     * 修改套餐信息和对应的口味信息
     * @param setmealDto
     */
    @Override
    public void updateWithDish(SetmealDto setmealDto) {
        //更新setmeal表的基本信息
        this.updateById(setmealDto);

        //删除setmealDish表中所对应的菜品信息
        LambdaQueryWrapper<SetmealDish> lqw = new LambdaQueryWrapper<>();
        lqw.eq(SetmealDish::getSetmealId,setmealDto.getId());
        setmealDishService.remove(lqw);

        //添加当前提交过来的菜品信息
        List<SetmealDish> setmealDishes = setmealDto.getSetmealDishes();
        setmealDishes = setmealDishes.stream().map((item)->{
            item.setSetmealId(setmealDto.getId());
            return item;
        }).collect(Collectors.toList());
        setmealDishService.saveBatch(setmealDishes);
    }


}
